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python_list,tuple,dictionary

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标签:取值   split   none   对组   pwd   key值   账户   ini   反转   

  1 #!user/bin/env python
  2 # -*- coding:utf-8 -*-练习
  3 # test.expandtab
  4 # 基本知识点编程(20) is to produce a table
  5 # test = "username\temail\tpassword\nlaiying\tlying@qq.com\t123\nlaiying\tlying@qq.com\t123\n"
  6 # v = test.expandtabs(20)
  7 # print(v)
  8 
  9 # test1 = ‘abc123‘
 10 # test2 = ‘456‘
 11 # test3 = ‘abc‘
 12 # test4 = ‘二‘
 13 # v1 = test1.isalpha()     #to judge if all the inputs are words
 14 # v2 = test2.isdecimal()   #to judge if all the inputs are decimal number
 15 # v3 = test3.isdigit()     #to judge if all the inputs are number, this method includes specialised signs
 16 # v4 = test4.isnumeric()  #it can identifise chinese number, such as "二"
 17 # print(v1)
 18 # print(v2)
 19 # print(v3)
 20 # print(v4)
 21 
 22 # transformation from lower words to upper words or from upper words to lower words
 23 # test = "aLEx"
 24 # v1 = test.lower()
 25 # v2 = test.upper()
 26 # v3 = test.swapcase()
 27 # print(v1,v2,v3,v4)
 28 
 29 # identifiers nr, letters,underline  def class
 30 # a = ‘123‘   #the first letter cannot initiate with nr, but it can be defined by letters or underline
 31 # b = ‘abc123‘
 32 # v1 = a.isidentifier()
 33 # v2 = b.isidentifier()
 34 # print(v1)
 35 # print(v2)
 36 
 37 # replace
 38 # test = "alexalexalexalex"
 39 # test1 = test.replace("ex", ‘bbb‘,2)
 40 # print(test1)
 41 
 42 # 将文字对应的索引打印出来
 43 # 法1
 44 # test = input(">>>")
 45 # print(test)
 46 # l = len(test)
 47 # print(l)
 48 # r = range(0,l)
 49 # for item in r:
 50 #     print(item, test[item])
 51 # 法2
 52 # test = input(">>>")
 53 # for item in range(0,len(test)):
 54 #     print(item, test[item])
 55 
 56 # 6.元组的一级元素不可修改/删除/增加
 57 # tu = (111,"alex",(11,22),[(33,44)],True,33,44,)
 58 # # 元组,有序。
 59 # v = tu[3][0][0]
 60 # print(v)
 61 # v=tu[3]
 62 # print(v)
 63 # tu[3][0] = 567
 64 # print(tu)
 65 
 66 # 字典由一系列键值对组成,键对值由key和value值组成,key值不能是Ture,列表,字典;value可以嵌套出现。
 67 
 68 # info = {
 69 #     "k1": 18,
 70 #     "k2": True,
 71 #     "k3": [
 72 #         11,
 73 #         [],
 74 #         (),
 75 #         22,
 76 #         33,
 77 #         {
 78 #             "kk1": "vv1",
 79 #             "kk2": "vv2",
 80 #             "kk3": (11,22)
 81 #         }
 82 #     ],
 83 #     "k4": (11,22,33,44)
 84 # }
 85 # print(info)
 86 
 87 # info = {
 88 #     2: "asdf",
 89 #     "k1": "123",
 90 #     True: "asdf",
 91 #     (11,22): 123,
 92 # }
 93 # print(info)
 94 # for item in info.keys():
 95 #     print(item,info[item])  输出关键字和值
 96 # 上面语句 = 下面语句
 97 # for j,k in info.items():
 98 #     print(j,k)
 99 
100 # info = {
101 #     "k1": "asdf",
102 #     True: "123",
103 #     (11,22):123,
104 #     # [11,22]:123,
105 #     # {"k1":"v1"}:123,
106 # }
107 # print(info)
108 
109 # 字典删除操作
110 # info = {
111 #     "k1": 18,
112 #     2: True,
113 #     "k3": [
114 #         11,
115 #         [],
116 #         (),
117 #         22,
118 #         33,
119 #         {
120 #             ‘kk1‘: ‘vv1‘,
121 #             ‘kk2‘: ‘vv2‘,
122 #             ‘kk3‘: (11,22),
123 #         }
124 #     ],
125 #     "k4": (11,22,33,44)
126 # }
127 # v1 = info[2]
128 # print(v1)
129 # v2 = info["k3"][5]["kk3"][0]
130 # print(v2)
131 # del info["k1"]
132 # print(info)
133 # del info["k3"][5]["kk1"]
134 # print(info)
135 
136 # 根据序列创建字典,并指定统一的值,静态方法
137 # v = dict.fromkeys(["k1",123,"999"],123)
138 # print(v)
139 
140 # 删除并获取值
141 # dic = {
142 #     "k1": "v1",
143 #     "k2": "v2",
144 # }
145 # v = dic.popitem()
146 # print(dic,v)
147 
148 # 若key值已存在,不设置,获取当前key值
149 # 若key值不存在,新设定key值,并获取当前key对应值
150 # dic = {
151 #     "k1": "v1",
152 #     "k2": "v2",
153 # }
154 # v = dic.setdefault("k3","v3")
155 # print(dic,v)
156 
157 # dic.update更新的两种方式
158 # dic = {
159 #     "k1": "v1",
160 #     "k2": "v2",
161 # }
162 # dic.update({‘k1‘:‘11111‘,‘k2‘:456})
163 # print(dic)
164 # dic.update(k1=123,k3=345,k5=‘asdf‘)
165 # print(dic)
166 
167 # 根据key读取值,key若不存在,直接输出key后面的值
168 # v = dic.get("k1",123)
169 # print(v)
170 # dic = {
171 #     "k1": ‘v1‘,
172 #     "k2": ‘v2‘
173 # }
174 # v = dic[‘k11111‘]
175 # print(v)
176 # v = dic.get(‘k1‘,111111)
177 # print(v)
178 
179 # 字典中最常用的操作
180 # key()    value()   item()     update()
181 
182 # 9-13节知识点(整理)
183 # 一、数字
184 # int(...)
185 
186 # 二、字符串
187 # replace/find/join/strip/startswith/split/lower/format
188 # 字符串格式化的两种方式
189 # template = "i am {name}, age : {age}"
190 # v1 = template.format(name="alex",age=25)
191 # v2 = template.format(**{"name":"alex","age":25})
192 # print(v1)
193 # print(v2)
194 
195 # 三、列表
196 # append、extend、insert
197 # 索引,切片,循环
198 
199 #四、元组
200 #忽略
201 #索引、切片、循环   元祖中一级元素不能被修改
202 
203 # 五、字典
204 # get/update/keys/values/items
205 # for,索引
206 # dic = {
207 #     "k1":‘v1‘,
208 # }
209 #
210 # v = ‘k1‘ in dic
211 # print(v)
212 #
213 # v = ‘v1‘ in dic.values()
214 # print(v)
215 
216 # 六、布尔值
217 # 0 1
218 # bool(...)
219 # None "" () [] {} 0 --> Flase(上述布尔值均为false)
220 
221 # day013 数字,字符串,列表,元组,字典作业练习
222 # 获取两个列表中相同的值
223 # l1 = [11,22,33,44]
224 # l2 = [66,77,22,33,44,55]
225 # for i in l1:
226 #     for j in l2:
227 #         if i == j:
228 #             print(j)
229 # for k in l1:
230 #     if k in l2:
231 #         print(k)
232 # 获取l1中有,l2中没有的元素列表
233 # l1 = [11,22,33,44]
234 # l2 = [66,77,22,33,44,55]
235 # for i in l1:
236 #     if i not in l2:
237 #         print(i)
238 # for i in l1:
239 #     if i in l2:
240 #         continue
241 #     else:
242 #         print(i)
243 # 获取l1中没有,l2中有的元素列表
244 # l1 = [11,22,33,44]
245 # l2 = [66,77,22,33,44,55]
246 # for i in l2:
247 #     if i not in l1:
248 #         print(i)
249 # for i in l2:
250 #     if i in l1:
251 #         continue
252 #     else:
253 #         print(i)
254 # 获取l1和l2中都不同的元素。
255 # l1 = [0,5,22,6,7,8,9]
256 # l2 = [0,5,44,6,7,8,9]
257 # for i in l1:
258 #     if i not in l2:
259 #         print(i)
260 # for i in l2:
261 #     if i not in l1:
262 #         print(i)
263 
264 # 有1,2,3,4,5,6,7,8 8个数字,组成互不相同且无重复数字的两位数
265 # num = 0
266 # list1 = [1,2,3,4,5,6,7,8]
267 # list2 = [1,2,3,4,5,6,7,8]
268 # for i1 in list1:
269 #     for i2 in list2:
270 #         if i1 != i2:
271 #             str2 = str(i1) + str(i2) #列表元素转换为字符串
272 #             # print(str2,end=" ")
273 #             num += 1
274 #             print(str2+"\t",end=‘‘)
275 # print("总共可以组成",num,"个")
276 
277 # range 操作 例如range(1,9) 输出1-8 8个数
278 # for i in range(1,9):
279 #     print(i)
280 
281 # 9x9乘法表
282 # for i in range(1,10):
283 #     str2 = ‘‘
284 #     for j in range(1,i+1):
285 #         print(str2 + str(j) + ‘*‘ + str(i) + ‘=‘ + str(i*j) + ‘\t‘,end=‘‘)
286 #     print(‘\n‘,end=‘‘)
287 # print(self, *args, sep=‘ ‘, end=‘\n‘, file=None) sep中间默认加空格,end中间加换行符
288 # 输出列表长度len()函数,print()函数具体用法
289 # li = [1,2,3,4]
290 # # print(len(li))
291 # for i in range(0,len(li)-1):
292 #     for j in range(i+1,len(li)):
293 #         print(li[i],li[j],sep=‘‘,end=‘\t‘)
294 
295 # 自动计算方案,公鸡5文钱一只,母鸡3文钱一只,小鸡3文钱三只,用100文钱买100只鸡,其中公鸡,母鸡,小鸡都要有,问公鸡,母鸡,小鸡要买多少只刚好凑足100文钱
296 # for x in range(1,100//5):
297 #     for y in range(1,100//3):
298 #         for z in range(1,100):
299 #             if x + y + z == 100 and 5*x + 3*y + (1/3)*z == 100:
300 #                 print(x,y,z)
301 
302 # 用代码实现,利用下划线将列表的每一个元素拼接成字符串,li = [‘alex‘,‘eric‘,‘rain‘]
303 # str2 = ‘‘
304 # li = [‘a‘,‘b‘,123]
305 # for i in range(0,len(li)):
306 #     str2 = str2 + str(li[i])
307 # print(str2)
308 
309 # join类型拼接列表元素
310 # li = [‘a‘,‘b‘,123]
311 # li[2] = str(li[2])
312 # str1 = ‘‘.join(li)
313 # print(str1)
314 
315 # 写代码,有如下元组,按照要求实现每一个功能
316 # tu = (‘alex‘,‘eric‘,‘rain‘)
317 # print(len(tu))
318 # print(tu[2])
319 # print(tu[1:])
320 # for item in tu:
321 #     print(item)
322 # for idx in range(0,len(tu)):
323 #     print(idx,end=‘ ‘)
324 # for idx, elem in enumerate(tu,3):   #enumerate重新添加列,再次从3开始编号
325 #     print(idx, elem)
326 
327 # 有如下变量,实现要求的功能
328 # a.讲述元祖的特性。
329 # 元组的一级元素不可修改,二级元组根据类型判断是否可以修改。
330 # b.请问tu变量中的第一个元素"alex"是否可以被修改。
331 # 不可以被修改
332 # c.请问tu变量中的"k2"对应的值是什么类型,是否可以被修改,如果可以请在其中添加一个
333 # k2对应的值是列表,可以被修改
334 # dic1=tu[1][2]
335 # list1=dic1.get("k2")
336 # list1.append("zhangsan")
337 # print(tu)
338 # d.请问tu变量中的“k3"对应的值是什么类型,是否可以被修改,如果可以请在其中添加一个
339 # tu=(
340 #     "alex",
341 #     [
342 #         11,
343 #         22,
344 #         {
345 #             "k1":"v1",
346 #             "k2":["age","name"],
347 #             "k3":(11,22,33)
348 #         },
349 #         44
350 #     ]
351 # )
352 # tu[1][2][‘k2‘].append(‘seven‘)
353 # print(tu[1][2][‘k2‘])
354 #
355 # dic1 = tu[1][2]
356 # list1 = dic1.get(‘k2‘)
357 # list1.append(‘sara‘)
358 # print(list1)
359 
360 # 列举布尔值是False的所有值
361 # 6 + 1 种bool的false值
362 # 6 = 3 + 3
363 # 3:[],(),{}
364 # 3:三个基本类型,int, string, bool
365 # 1:None
366 
367 # 有如下列表
368 # nums=[2,7,11,15,1,8,7]
369 # # 请找到列表中任意两个元素相加能够等于9的元素集合,如:[(0,1),(4,5)],输出索引
370 # s = []
371 # for x in range(0,len(nums)):
372 #     for y in range(0,len(nums)):
373 #         if nums[x] + nums[y] == 9:
374 #             s.append((x,y))
375 # print(s)
376 
377 # 写代码,有如下列表,按照要求实现每一个功能
378 # a.计算列表长度
379 # print(len(li))
380 # b.列表中追加元素“seven”,并输出添加后的列表。
381 # li.append(‘seven‘)
382 # print(li)
383 # c.请在列表的第1个位置插入元素“tony”并输出添加后的列表。
384 # li.insert(1,‘tony‘)
385 # print(li)
386 # d.请修改第二个位置的元素为“kelly”,并输出修改后的列表。
387 # li[1] = ‘Kelly‘
388 # print(li)
389 # e.请删除列表中的的元素“eric”,并输出修改后的列表。
390 # li.remove(‘eric‘)
391 # print(li)
392 # f.请删除列表中的第2个元素,并输出删除的元素值和删除元素后的列表
393 # v = li.pop(1)
394 # print(v,‘\t‘,li)
395 # g.请删除列表中的第3个元素,并输出删除元素后的列表。
396 # li.pop(2)
397 # print(li)
398 # h.请删除列表中的第2至第4个元素,并输出删除后的元素列表。
399 # pop值删除应从大到小
400 # li.pop(4)
401 # li.pop(3)
402 # li.pop(2)
403 # print(li)
404 # print(li[1:4])
405 # i.请将列表所有元素反转,并输出翻转后的列表。
406 # li.reverse()
407 # print(li)
408 # j.请使用for len range 输出列表索引。
409 # for i1 in range(len(li)):
410 #     print(i1)
411 # 使用enumrate输出列表元素和序号(序号从100开始)
412 # li = ["alex","eric","rain","tony","sara",‘111‘,‘222‘]
413 # for j,k in enumerate(li,100):
414 #     print(j,k)
415 
416 # 分页显示内容
417 # a.通过for循环创建301条数据,数据类型不限,如:
418 # Alex-1      Alex1@live.com    pwd1
419 # Alex-2      Alex2@live.com    pwd2
420 # Alex-3      Alex3@live.com    pwd3
421 # user_list = []
422 # for i in range(1,302):
423 #     temp = {‘name‘: ‘alex‘ + str(i),‘email‘: ‘alex‘+ str(i) + ‘@lve.com‘, ‘pwd‘+str(i): ‘pwd‘}
424 #     user_list.append(temp)
425 # while True:
426 #     s = input(‘请输入1-30的任意一个数:‘)
427 #     s = int(s)
428 #     result = user_list[10*(s-1):10*s]
429 #     for item in result:
430 #         print(item,type(item))
431 
432 # 查找列表中元素,移除每个元素空格,并查找以a或A开头,并且以c结尾的所有元素。
433 # li = ["alec", " aric", "AleC", "Tony", "rain"]
434 # tu = ("alec", " aric","aleC", "  Alex  ", "Tony", "rain")
435 # dic = {"k1": "alec", "k2": "aric", "k3": "Alex", "k4": "Tony", "k5": "rain"}
436 # for li1 in li:
437 #     li2 = li1.strip()
438 #     if li2.startswith(‘a‘) or li2.startswith(‘A‘):
439 #         if li2.endswith(‘c‘) or li2.endswith(‘C‘):
440 #             print(li2)
441 # print(‘\n‘,end=‘‘)
442 # for tu1 in tu:
443 #     tu2 = tu1.strip()
444 #     if tu2.startswith(‘a‘) or tu2.startswith(‘A‘):
445 #         if tu2.endswith(‘c‘) or tu2.endswith(‘C‘):
446 #             print(tu2)
447 # print(‘\n‘,end=‘‘)
448 # for dic1 in dic.values():
449 #     dic2 = dic1.strip()
450 #     if dic2.startswith(‘a‘) or dic2.startswith(‘A‘):
451 #         if dic2.endswith(‘c‘) or dic2.endswith(‘C‘):
452 #             print(dic2)
453 
454 # 有如下元祖,按照要求实现每一个功能。
455 # tu = ("alex", "eric", "rain")
456 # a.计算元组的长度并输出.
457 # print(len(tu))
458 # b.获取元祖的第2个元素,并输出
459 # print(tu[1])
460 # c.获取元祖的第1-2个元素,并输出
461 # print(tu[0:2])
462 # d.请使用for输出元祖的元素。
463 # for i in range(0,len(tu)):
464 #     print(tu[i])
465 # for tu1 in tu:
466 #     print(tu1)
467 # e.请使用for、len、range输出元组的索引。
468 # for tu1 in range(len(tu)):
469 #     print(tu1)
470 # f.请使用enummrate输出元组的元素和序号(序号从10开始)
471 # for idx,val in list(enumerate(tu,start=10)):
472 #     print(idx,val)
473 # for idx,val in enumerate(tu,10):
474 #     print(idx,val)
475 
476 # 字典
477 # dic = {"K1": "V1", "K2": "V2", "K3": [11, 22, 33]}
478 # a.请输出所有的key
479 # for key in dic.keys():
480 #     print(key)
481 # b.请输出所有的value
482 # for values1 in dic.values():
483 #     print(values1)
484 # c.请循环输出所有的key和value
485 # for keys,values in dic.items():
486 #     print(keys,values)
487 # d.请在字典中添加一对键值对,“K4”:“V4”,输出添加后的字典。
488 # dic.setdefault(‘K4‘,‘V4‘)
489 # print(dic)
490 # e.请修改字典中的"K1"对应的值为"alex",输出修改后的字典。
491 # dic.update(K1=‘alex‘) #如果能找到对应的键,替换对应值,否则在字典末尾添加一对新的键值
492 # print(dic)
493 # f.请在K3对应的值中追加一个元素44,输出修改后的字典。
494 # dic[‘K3‘].append(44)
495 # print(dic)
496 # g.请在K3对应的值第1个位置插入个元素18,输出修改后的字典
497 # dic[‘K3‘].insert(0,18)
498 # print(dic)
499 
500 # 转换
501 # a. 将字符串 s="alex"转换为列表
502 # s="alex"
503 # print(list(s),tuple(s))
504 # c. 将列表 s=["alex","seven"]转换为元组
505 # s=["alex","seven"]
506 # tuple1 = tuple(s)
507 # print(tuple1)
508 # d. 将元组 s=("alex","seven")转换为列表
509 # s = (‘alex‘,‘seven‘)
510 # print(list(s))
511 # e. 将列表 s=["alex","seven","zhansan","lisi"]转换成字典,而且字典的key按照10开始向后递增。
512 # s=["alex","seven","zhansan","lisi"]
513 # dic = {}
514 # for i,j in enumerate(s,start=10):
515 #     dic.setdefault(i,j)
516 # print(dic)
517 
518 # 元素和分类
519 # 有如下值的结合[11,22,33,44,55,66,77,88,99,90]将所有大于66的值保存在字典的第1个key值中,小于66保存在第2个key值中。即
520 # {"k1":大于66的所有值,"k2":小于66的所有值}
521 # li = [11,22,33,44,55,66,77,88,99,90]
522 # li1 = []
523 # li2 = []
524 # for i in li:
525 #     if i>66:
526 #         li1.append(i)
527 #     else:
528 #         li2.append(i)
529 # print({‘k1‘:li1,‘k2‘:li2})
530 
531 # 输出商品列表,用户输入序号,显示用户选中的商品。
532 # 商品 li =["手机","电脑","鼠标","游艇","飞机"]
533 # li =["手机","电脑","鼠标","游艇","飞机"]
534 # dic = {}
535 # while True:
536 #     goods = input("请输入想要添加的商品:")
537 #     if goods == ‘0‘:
538 #         break
539 #     li.append(goods)
540 # num = int(input("请输入显示内容的序号:"))
541 # for key,value in enumerate(li,start=1):
542 #     dic.setdefault(key,value)
543 # print(dic.get(num)) #字典得到get的值,输出,get到的值不在键值对中,就输出None,或者输出自己定义的字符串
544 # print(dic)
545 
546 # 购物车
547 # 功能要求:
548 # 要求用户输入总资产,比如:2000
549 # 显示商品列表,让用户根据序号选择商品,加入购物车。
550 # 购买,如果商品总额大于总资产,提示账户余额不足,否则购买成功。
551 # goods = [
552 #     {"name": "电脑", "price": 1999},
553 #     {"name": "鼠标", "price": 10},
554 #     {"name": "电灯", "price": 20},
555 #     {"name": "椅子", "price": 899}
556 # ]
557 # num = 0
558 # total = input("请输入持有金额:")
559 # for good in goods:
560 #     print(num,good.get(‘name‘))
561 #     num += 1  #显示序号
562 # buy = 0
563 # while True:
564 #     count = input("请输入购买物品序号,输入ok结束购买:")  #c购买货物数量应答器
565 #     if count == ‘ok‘: #输出是否购买成功消息
566 #         if int(total) - buy >= 0:
567 #             print(‘购买成功,请付款:‘,buy)
568 #             break
569 #         else:
570 #             print(‘购买失败,你还需要:‘,buy-int(total))
571 #             break
572 #     else:  #输出购买累计金额
573 #         if  count.isdecimal() and int(count) <= len(goods):#isdecimal判断是否为十进制小数
574 #             sp = goods[int(count)]
575 #             buy += sp.get(‘price‘)
576 #         else:
577 #             continue

 

python_list,tuple,dictionary

标签:取值   split   none   对组   pwd   key值   账户   ini   反转   

原文地址:https://www.cnblogs.com/yuyukun/p/10354317.html

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